Hello, OP here. So I never did get a resolution from Meraki. I spent hours on the phone with Meraki support and took countless pcaps. I eventually had to give up because I don't have a device that can capture in monitor-mode and supports 802.11ac on 20/40/80Ghz bands. I have had a hard time tracking anything down that can do this, short of a new model Macbook Pro...but seriously there has to be something other than a Macbook that can adequately run 802.11ac monitor-mode? Another thing that was frustrating was an apparent bug that Meraki has in their own AP capture mechanism, where capturing on the AP doesn't show 2-way traffic. I forget the specifics but at the time i was like "seriously guys?" So, the only fix I have when this issue crops up is to still reboot the AP, or fiddle with a setting that resets the radio. If anybody has a suggestion for a rig I can setup remotely to capture 802.11ac monitor-mode, that would be really great.
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